Coolant control valve unit having sealing structure

Patent metadata

Field	Value
Publication number	US-10352460-B2
Application number	US-201715583203-A
Country	US
Kind code	B2
Filing date	May 1, 2017
Priority date	May 4, 2016
Publication date	Jul 16, 2019
Grant date	Jul 16, 2019

Abstract

Disclosed is a coolant control valve unit having a sealing structure, the control valve unit including: a rotary valve provided with a valve coolant passage formed from an inner surface to an outer surface of the rotary valve; a valve housing in which the rotary valve is rotatably provided; a fitting coupled to the valve housing, and having a fitting coolant passage; and a sealing unit provided between a front surface of the fitting and the outer surface of the rotary valve, wherein the sealing unit includes: a sealing ring being in contact with the outer surface of the rotary valve; and a rubber ring provided on the front surface of the fitting, and bringing the sealing ring into contact with the outer surface of the rotary valve, wherein the rubber ring has an X-shaped cross-section, with a front groove, a rear groove, an inner groove, and an outer groove.

First claim

The invention claimed is:

1. A coolant control valve unit having a sealing structure, the control valve unit comprising:
a rotary valve having a valve coolant passage from an inner circumferential surface to an outer circumferential surface of the rotary valve;
a valve housing in which the rotary valve is rotatably disposed;
a fitting coupled to the valve housing at, a position corresponding to the valve coolant passage, and having a fitting coolant passage corresponding to the valve coolant passage; and
a sealing unit disposed between a front surface of the fitting and the outer circumferential surface of the rotary valve,
wherein the sealing unit includes:
a sealing ring being in contact with the outer circumferential surface of the rotary valve to realize a slidable relationship therebetween;
a rubber ring disposed on the front surface of the fitting, and bringing the sealing ring into close and elastic contact with the outer circumferential surface of the rotary valve; and
a support ring disposed between a rear surface of the sealing ring and the rubber ring, wherein the rubber ring has an X-shaped cross-section and comprises:
a front groove grooved along a center of a front surface of the rubber ring;
a rear groove grooved along a center of a rear surface of the rubber ring;
an inner groove grooved along an, inner surface of the rubber ring to be directed toward a center of the fitting coolant passage; and
an outer groove grooved oppositely to the inner groove,

wherein the support ring includes:
a support ring outer protrusion protruding on an outer circumference of a front surface of the support ring; and
a support ring inner protrusion protruding on an inner circumference of a rear surface of the support ring,

wherein the fitting has a fitting inner protrusion circumferentially protruding on the front surface of the fitting at a position close to the center of the fitting coolant passage to correspond to the support ring inner protrusion, wherein the support ring inner protrusion and the fitting inner protrusion are spaced apart from each other by a predetermined gap in which the rubber ring is disposed to be stretched and compressed in a space between the fitting and the support ring,
wherein the fitting has a fitting outer protrusion circumferentially protruding on the front surface of the fitting at a position outside the fitting inner protrusion, with the rubber ring being disposed therebetween,
wherein the fitting outer protrusion extends forward such that an inner circumferential surface of the fitting outer protrusion faces at least a part of an outer circumferential surface of the support ring outer protrusion, and
wherein an inner diameter of the sealing ring corresponds to an inner diameter of the fitting and an inner diameter of the support ring such that a coolant passing through the fitting coolant passage passes a passage formed by the inner diameter of the sealing ring.

2. The control valve unit of claim 1 , wherein the rubber ring comprises:
front protrusions between the front groove and the outer groove and between the front groove and the inner groove, respectively; and
rear protrusions between the rear groove and the outer groove and between the rear groove and the inner groove, respectively,
wherein the front protrusions and the rear protrusions extend in four directions by predetermined distances to have the X-shaped cross-section.

3. The control valve unit of claim 1 , wherein each of the sealing ring and the rubber ring has a ring shape corresponding to a shape of the valve coolant passage.

4. The control valve unit of claim 3 , wherein the outer circumferential surface of the rotary valve is a ball-shaped curved surface, and the valve coolant passage passes through the ball-shaped curved surface.

5. The control valve unit of claim 2 , wherein the rubber ring further includes an auxiliary protrusion in the outer groove by protruding outward.

6. The control valve unit of claim 4 , wherein the outer circumferential surface of the rotary valve is a ball-shaped curved surface, and the sealing ring has an inclined surface corresponding to the ball-shaped curved surface.

7. A sealing unit, comprising:
a sealing ring;
a support ring disposed on a rear surface of the sealing ring;
a rubber ring disposed on a rear surface of the support ring; and
a fitting which is in contact with the support ring and the rubber ring, wherein the fitting is coupled to a valve housing of a coolant control valve unit to connect the sealing unit to the coolant control valve unit,
wherein the rubber ring has an X-shaped cross section and comprises:
a front groove grooved at a center of a front surface of the rubber ring;
a rear groove grooved at a center of a rear surface of the rubber ring;
an inner groove grooved along an inner surface of the rubber ring; and
an outer groove grooved oppositely to the inner groove,
wherein the support ring, which is disposed between the rear surface of the sealing ring and the rubber ring, includes:
a support ring outer protrusion protruding on an outer circumference of a front surface of the support ring; and
a support ring inner protrusion protruding on an inner circumference of the rear surface of the support ring,

wherein the fitting includes:
a fitting coolant passage passing through a center of the fitting;
a fitting inner protrusion circumferentially protruding from a front surface of the fitting to correspond to the support ring inner protrusion, wherein the support ring inner protrusion and the fitting inner protrusion are spaced apart from each other by a predetermined gap in which the rubber ring is disposed to be stretched and compressed in a space between the fitting and the support ring; and
a fitting outer protrusion circumferentially protruding from the front surface of the fitting at a position outside the fitting inner protrusion, with the rubber ring being disposed therebetween,

wherein the fitting outer protrusion extends forward such that an inner circumferential surface of the fitting outer protrusion faces at least a part of an outer circumferential surface of the support ring outer protrusion, and
wherein an inner diameter of the sealing ring corresponds to an inner diameter of the fitting and an inner diameter of the support ring such that a coolant passing through the fitting coolant passage passes a passage formed by the inner diameter of the sealing ring.

8. The sealing unit of claim 7 , wherein the rubber ring further includes an auxiliary protrusion formed in the outer groove by protruding outward.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Nvh Korea Inc
• Inzi Controls Co Ltd
• Gmb Korea Corp
• Mvh Korea Inc

Inventors

• Jang Jae Soo
• Lee Phil Gi
• Yi Jea Woong
• Lee Ju Bong
• Lee In Hee
• Kim Seo Kyu
• Park Cheol Soo

Classifications

• F16K5/205

  Sealing effected by the flowing medium · CPC title

• F16K5/201

  with the housing or parts of the housing mechanically pressing the seal against the plug · CPC title

• F01P2007/146

  using valves · CPC title

• F16K11/087

  with spherical plug · CPC title

• F16K5/0678 Primary

  in which only one of the components of the composite packing is contacting the plug · CPC title